Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8061485 | Elevator installation operating method for transporting elevator users | — | 2011-11-22 |
| 8047333 | Method and elevator installation for user selection of an elevator | — | 2011-11-01 |
| 7918318 | Method and system for modernization of an elevator installation | Paul Friedli | 2011-04-05 |